This error doesn't look right:
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Line 7, column 15:
<frameset rows="105,999*" frameborder="NO" border="0" framespacing="0" ...
^
Error: there is no attribute "ROWS" for this element (in this HTML version)
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That sure looks like a ROWS element.
There are several similar errors listed. Here's the URL:
http://validator.w3.org/check?uri=http://www.quaesitium.com/&charset=(detect+automatically)&doctype=HTML+4.01+Transitional
Important note: that's not my page, I was just checking to see if the validator would catch an obscure error, backslash vs. forward slash:
src="quaesitium\title.htm"
should be
src="quaesitium/title.htm"
Scott
(who is not subscribed to this list, just following the instructions on http://validator.w3.org/feedback.html)